.banner {
  height: 500px;
  background-color: #f5f5f5;
}
.banner .wrapper {
  position: relative;
  height: 500px;
  /* 溢出隐藏 */
  overflow: hidden;
  background-color: pink;
}

.banner .wrapper .pic {
  display: flex;
  width: 3720px;
  background-color: blueviolet;
}

.banner .subnav {
  position: absolute;
  left: 0;
  top: 0;
  width: 250px;
  height: 500px;
  background-color: rgba(0, 0, 0, 0.42);
}
.subnav li {
  display: flex;
  justify-content: space-between;
  padding-left: 30px;
  padding-right: 12px;
  height: 50px;
  line-height: 50px;
  color: #fff;
}
.subnav li a {
  margin-right: 5px;
  font-size: 14px;
  color: #fff;
}
.subnav li .classify {
  margin-right: 14px;
  font-size: 16px;
}
.subnav li .iconfont {
  font-size: 14px;
}
.subnav li:hover {
  background-color: #00be9a;
}

.banner .wrapper ol{
  position: absolute;
  display: flex;
  bottom: 17px;
  right: 16px;
}
.banner .wrapper ol li{
 
  width: 22px;
  height: 22px;
  margin: 4px;
  border-radius: 50%;
}
.banner .wrapper ol li.current{
  background-color: rgba(255, 255, 255, 0.42);
}
.banner .wrapper ol li i{
  display: block;
  width: 14px;
  height: 14px;
  margin: 4px;
  background-color: #fff;
  border-radius: 50%;
}

 